Pebble (noun)

1. A small, round or oval stone that is typically smaller than a cobblestone and larger than a grain of sand.
2. A small rock that is typically smooth and rounded as a result of being worn down by water or wind.
3. A small, smooth stone that is used for throwing in games or for skipping across water.

Origin:

From the old english pebban, which is of germanic origin, related to dutch and german pebbel, and ultimately from the indo-european root *peb- "to pound, hit".

Examples:

1. She found a shiny pebble on the beach.
2. He liked to collect pebbles of different shapes and sizes.
3. The pebbles in the garden added texture and interest.
4. The pebble-dashed wall was a popular finish in the 1960s.
5. The pebbles in the stream made a soothing sound.